Improvement in chucks for holding pipe-fittings



J. FLOWER.

CH'I'JCKS FOR. HOLDING PIPE-FITTINGS.

No. 189,445, Patented April 10, 1877.

UNITED STATEs PATENT OFFICE.

JAMES FLOWER, OF DETROIT, MICHIGAN.

IMPROVEMENT IN CHUCKS FOR HOLDING PIPE-FITTINGS.

Specification Forming part of Letters Patent No. 189,445, dated April10, 1877 application filed January 4, 1877.

To all whom it may concern Be it known that 1, JAMES FLOWER, of Detroit,in the county of Wayne and State of Michigan, have invented a new anduseful Improvement in Chucks; and I do declare that the following is atrue and accurate description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,and being a part of this specification, in which- Figure l is aperspective of a chuck, showing my improvement, with a globe valve showntherein. Fig. 2 is a like view of one of the rotating heads detached.

Like letters indicate like parts in each figure.

The nature of my invention relates to an improvement in chucks forlathes, planing and other machines; and it consists in the construction,combination, and arrangement of the several parts of my improved chuck.

In the drawings, A represents .a chuckframe of the ordinaryconstruction, provided with two chuck-heads, B O, the lower ends ofwhich engage, in the usual way, with the right and left handed screw D,by means of which the heads are forced toward each other or retracted,as may be desired. Secured to each of the chuck-heads are the revolvingheads E F, by means of suitable bolts passing through them and thestationary heads B 0. One of these chuck-heads, B, is provided with aspring-bolt, I), which passes through the head and engages with one ofthe holes a in the revolving head E. These holes are drilled at regularintervals, and there may be as many as desired. When the article to befinished up is secured by the dies on the inner faces of the rotatingheads it may be rotated with the heads to any desired position, bywithdrawing the springbolt 1).

What I claim as my invention, and desire to secure by Letters Patent,is-- The combination, with the chuck-frame A, stationary chuck-heads BG, and right-andleft-hand screw D, of the revolving heads E F, and thespring-bolt b, constructed and arranged substantially as described andshown.

JAMES FLOWER. Witnesses:

GEAs. J. HUNT, H. S. SPRAGUE.

